1. How Do People Behave in Crowds?

2. An increase in performance in the presence of a crowd.
Social Facilitation
An increase in performance in the presence of a crowd.

3. A decrease in performance in the presence of a crowd.
Social Inhibition
A decrease in performance in the presence of a crowd.

4. Deindividuation
Increased tendency for subjects to behave irrationally when there is less chance of being personally identified.

5. Bystander Effect
To feel inhibited from taking action because of the presence of others.

6. Pluralistic Ignorance – You assume nothing is wrong because no one else is acting concerned.
Social proof - When unable to determine the appropriate mode of behavior you assume surrounding people possess more knowledge about the situation and react based on their behavior

7. Factors that reduce the bystander effect
A. Bystanders know one another.
B. Witnesses have special bond to the victim.
C. Bystanders think that the victim is especially dependent on them.
D. Bystanders have considerable training in emergency intervention.
E. Witnesses have knowledge of the bystander effect.

8. Informational Influence Theory
Using the reactions of others to judge the seriousness of the situation.

9. Diffusion responsibility
The presence of others cause you to feel less responsibility therefore less likely to take action.

10. Why Do We Join Groups?
Social comparison theory – A need to compare ourselves to others
(measure the correctness of our attitudes and beliefs)
Socially Oriented groups Members that are primarily concerned about
maintaining social relationships within the group
Task-oriented groups Members who have specific duties to complete

11. Group Dynamics
Group Cohesion group togetherness, sharing common attributes.
Group Norms- formal or informal rules about how group members
should behave.